Buoy



FIG. 1 is a perspective view of a "buoy" showing our new design;

FIG. 2 is a plan view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is an inverted plan view thereof; and,

FIG. 6 is a left side elevational view thereof, with the opposite side being a mirror image. 

The ornamental design for a buoy, as shown and described. 